1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "OpenGLRenderer" 18 19#include <ui/Rect.h> 20 21#include <private/hwui/DrawGlInfo.h> 22 23#include "LayerCache.h" 24#include "LayerRenderer.h" 25#include "Matrix.h" 26#include "Properties.h" 27#include "Rect.h" 28 29namespace android { 30namespace uirenderer { 31 32/////////////////////////////////////////////////////////////////////////////// 33// Rendering 34/////////////////////////////////////////////////////////////////////////////// 35 36LayerRenderer::LayerRenderer(Layer* layer): mLayer(layer) { 37} 38 39LayerRenderer::~LayerRenderer() { 40} 41 42void LayerRenderer::setViewport(int width, int height) { 43 initViewport(width, height); 44} 45 46status_t LayerRenderer::prepareDirty(float left, float top, float right, float bottom, 47 bool opaque) { 48 LAYER_RENDERER_LOGD("Rendering into layer, fbo = %d", mLayer->getFbo()); 49 50 glBindFramebuffer(GL_FRAMEBUFFER, mLayer->getFbo()); 51 52 const float width = mLayer->layer.getWidth(); 53 const float height = mLayer->layer.getHeight(); 54 55 Rect dirty(left, top, right, bottom); 56 if (dirty.isEmpty() || (dirty.left <= 0 && dirty.top <= 0 && 57 dirty.right >= width && dirty.bottom >= height)) { 58 mLayer->region.clear(); 59 dirty.set(0.0f, 0.0f, width, height); 60 } else { 61 dirty.intersect(0.0f, 0.0f, width, height); 62 android::Rect r(dirty.left, dirty.top, dirty.right, dirty.bottom); 63 mLayer->region.subtractSelf(r); 64 } 65 66 return OpenGLRenderer::prepareDirty(dirty.left, dirty.top, dirty.right, dirty.bottom, opaque); 67} 68 69status_t LayerRenderer::clear(float left, float top, float right, float bottom, bool opaque) { 70 if (mLayer->isDirty()) { 71 getCaches().disableScissor(); 72 glClear(GL_COLOR_BUFFER_BIT); 73 74 getCaches().resetScissor(); 75 mLayer->setDirty(false); 76 77 return DrawGlInfo::kStatusDone; 78 } 79 80 return OpenGLRenderer::clear(left, top, right, bottom, opaque); 81} 82 83void LayerRenderer::finish() { 84 OpenGLRenderer::finish(); 85 86 generateMesh(); 87 88 LAYER_RENDERER_LOGD("Finished rendering into layer, fbo = %d", mLayer->getFbo()); 89 90 // No need to unbind our FBO, this will be taken care of by the caller 91 // who will invoke OpenGLRenderer::resume() 92} 93 94GLint LayerRenderer::getTargetFbo() { 95 return mLayer->getFbo(); 96} 97 98bool LayerRenderer::suppressErrorChecks() { 99 return true; 100} 101 102/////////////////////////////////////////////////////////////////////////////// 103// Dirty region tracking 104/////////////////////////////////////////////////////////////////////////////// 105 106bool LayerRenderer::hasLayer() { 107 return true; 108} 109 110Region* LayerRenderer::getRegion() { 111 if (getSnapshot()->flags & Snapshot::kFlagFboTarget) { 112 return OpenGLRenderer::getRegion(); 113 } 114 return &mLayer->region; 115} 116 117// TODO: This implementation is flawed and can generate T-junctions 118// in the mesh, which will in turn produce cracks when the 119// mesh is rotated/skewed. The easiest way to fix this would 120// be, for each row, to add new vertices shared with the previous 121// row when the two rows share an edge. 122// In practice, T-junctions do not appear often so this has yet 123// to be fixed. 124void LayerRenderer::generateMesh() { 125 if (mLayer->region.isRect() || mLayer->region.isEmpty()) { 126 if (mLayer->mesh) { 127 delete mLayer->mesh; 128 delete mLayer->meshIndices; 129 130 mLayer->mesh = NULL; 131 mLayer->meshIndices = NULL; 132 mLayer->meshElementCount = 0; 133 } 134 135 mLayer->setRegionAsRect(); 136 return; 137 } 138 139 size_t count; 140 const android::Rect* rects = mLayer->region.getArray(&count); 141 142 GLsizei elementCount = count * 6; 143 144 if (mLayer->mesh && mLayer->meshElementCount < elementCount) { 145 delete mLayer->mesh; 146 delete mLayer->meshIndices; 147 148 mLayer->mesh = NULL; 149 mLayer->meshIndices = NULL; 150 } 151 152 bool rebuildIndices = false; 153 if (!mLayer->mesh) { 154 mLayer->mesh = new TextureVertex[count * 4]; 155 mLayer->meshIndices = new uint16_t[elementCount]; 156 rebuildIndices = true; 157 } 158 mLayer->meshElementCount = elementCount; 159 160 const float texX = 1.0f / float(mLayer->getWidth()); 161 const float texY = 1.0f / float(mLayer->getHeight()); 162 const float height = mLayer->layer.getHeight(); 163 164 TextureVertex* mesh = mLayer->mesh; 165 uint16_t* indices = mLayer->meshIndices; 166 167 for (size_t i = 0; i < count; i++) { 168 const android::Rect* r = &rects[i]; 169 170 const float u1 = r->left * texX; 171 const float v1 = (height - r->top) * texY; 172 const float u2 = r->right * texX; 173 const float v2 = (height - r->bottom) * texY; 174 175 TextureVertex::set(mesh++, r->left, r->top, u1, v1); 176 TextureVertex::set(mesh++, r->right, r->top, u2, v1); 177 TextureVertex::set(mesh++, r->left, r->bottom, u1, v2); 178 TextureVertex::set(mesh++, r->right, r->bottom, u2, v2); 179 180 if (rebuildIndices) { 181 uint16_t quad = i * 4; 182 int index = i * 6; 183 indices[index ] = quad; // top-left 184 indices[index + 1] = quad + 1; // top-right 185 indices[index + 2] = quad + 2; // bottom-left 186 indices[index + 3] = quad + 2; // bottom-left 187 indices[index + 4] = quad + 1; // top-right 188 indices[index + 5] = quad + 3; // bottom-right 189 } 190 } 191} 192 193/////////////////////////////////////////////////////////////////////////////// 194// Layers management 195/////////////////////////////////////////////////////////////////////////////// 196 197Layer* LayerRenderer::createLayer(uint32_t width, uint32_t height, bool isOpaque) { 198 LAYER_RENDERER_LOGD("Requesting new render layer %dx%d", width, height); 199 200 Caches& caches = Caches::getInstance(); 201 GLuint fbo = caches.fboCache.get(); 202 if (!fbo) { 203 ALOGW("Could not obtain an FBO"); 204 return NULL; 205 } 206 207 caches.activeTexture(0); 208 Layer* layer = caches.layerCache.get(width, height); 209 if (!layer) { 210 ALOGW("Could not obtain a layer"); 211 return NULL; 212 } 213 214 layer->setFbo(fbo); 215 layer->layer.set(0.0f, 0.0f, width, height); 216 layer->texCoords.set(0.0f, height / float(layer->getHeight()), 217 width / float(layer->getWidth()), 0.0f); 218 layer->setAlpha(255, SkXfermode::kSrcOver_Mode); 219 layer->setBlend(!isOpaque); 220 layer->setColorFilter(NULL); 221 layer->setDirty(true); 222 layer->region.clear(); 223 224 GLuint previousFbo; 225 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 226 227 glBindFramebuffer(GL_FRAMEBUFFER, layer->getFbo()); 228 layer->bindTexture(); 229 230 // Initialize the texture if needed 231 if (layer->isEmpty()) { 232 layer->setEmpty(false); 233 layer->allocateTexture(GL_RGBA, GL_UNSIGNED_BYTE); 234 235 if (glGetError() != GL_NO_ERROR) { 236 ALOGD("Could not allocate texture for layer (fbo=%d %dx%d)", 237 fbo, width, height); 238 239 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 240 241 Caches::getInstance().resourceCache.decrementRefcount(layer); 242 243 return NULL; 244 } 245 } 246 247 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 248 layer->getTexture(), 0); 249 250 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 251 252 return layer; 253} 254 255bool LayerRenderer::resizeLayer(Layer* layer, uint32_t width, uint32_t height) { 256 if (layer) { 257 LAYER_RENDERER_LOGD("Resizing layer fbo = %d to %dx%d", layer->getFbo(), width, height); 258 259 if (Caches::getInstance().layerCache.resize(layer, width, height)) { 260 layer->layer.set(0.0f, 0.0f, width, height); 261 layer->texCoords.set(0.0f, height / float(layer->getHeight()), 262 width / float(layer->getWidth()), 0.0f); 263 } else { 264 Caches::getInstance().resourceCache.decrementRefcount(layer); 265 return false; 266 } 267 } 268 269 return true; 270} 271 272Layer* LayerRenderer::createTextureLayer(bool isOpaque) { 273 LAYER_RENDERER_LOGD("Creating new texture layer"); 274 275 Layer* layer = new Layer(0, 0); 276 layer->setCacheable(false); 277 layer->setTextureLayer(true); 278 layer->setBlend(!isOpaque); 279 layer->setEmpty(true); 280 layer->setFbo(0); 281 layer->setAlpha(255, SkXfermode::kSrcOver_Mode); 282 layer->layer.set(0.0f, 0.0f, 0.0f, 0.0f); 283 layer->texCoords.set(0.0f, 1.0f, 1.0f, 0.0f); 284 layer->region.clear(); 285 layer->setRenderTarget(GL_NONE); // see ::updateTextureLayer() 286 287 Caches::getInstance().activeTexture(0); 288 layer->generateTexture(); 289 290 return layer; 291} 292 293void LayerRenderer::updateTextureLayer(Layer* layer, uint32_t width, uint32_t height, 294 bool isOpaque, GLenum renderTarget, float* transform) { 295 if (layer) { 296 layer->setBlend(!isOpaque); 297 layer->setSize(width, height); 298 layer->layer.set(0.0f, 0.0f, width, height); 299 layer->region.set(width, height); 300 layer->regionRect.set(0.0f, 0.0f, width, height); 301 layer->getTexTransform().load(transform); 302 303 if (renderTarget != layer->getRenderTarget()) { 304 layer->setRenderTarget(renderTarget); 305 layer->bindTexture(); 306 layer->setFilter(GL_NEAREST, false, true); 307 layer->setWrap(GL_CLAMP_TO_EDGE, false, true); 308 } 309 } 310} 311 312void LayerRenderer::destroyLayer(Layer* layer) { 313 if (layer) { 314 LAYER_RENDERER_LOGD("Recycling layer, %dx%d fbo = %d", 315 layer->getWidth(), layer->getHeight(), layer->getFbo()); 316 317 if (!Caches::getInstance().layerCache.put(layer)) { 318 LAYER_RENDERER_LOGD(" Destroyed!"); 319 Caches::getInstance().resourceCache.decrementRefcount(layer); 320 } else { 321 LAYER_RENDERER_LOGD(" Cached!"); 322#if DEBUG_LAYER_RENDERER 323 Caches::getInstance().layerCache.dump(); 324#endif 325 layer->removeFbo(); 326 layer->region.clear(); 327 } 328 } 329} 330 331void LayerRenderer::destroyLayerDeferred(Layer* layer) { 332 if (layer) { 333 LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->getFbo()); 334 335 Caches::getInstance().deleteLayerDeferred(layer); 336 } 337} 338 339void LayerRenderer::flushLayer(Layer* layer) { 340#ifdef GL_EXT_discard_framebuffer 341 GLuint fbo = layer->getFbo(); 342 if (layer && fbo) { 343 // If possible, discard any enqueud operations on deferred 344 // rendering architectures 345 if (Caches::getInstance().extensions.hasDiscardFramebuffer()) { 346 GLuint previousFbo; 347 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 348 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, fbo); 349 350 const GLenum attachments[] = { GL_COLOR_ATTACHMENT0 }; 351 glDiscardFramebufferEXT(GL_FRAMEBUFFER, 1, attachments); 352 353 if (fbo != previousFbo) glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 354 } 355 } 356#endif 357} 358 359bool LayerRenderer::copyLayer(Layer* layer, SkBitmap* bitmap) { 360 Caches& caches = Caches::getInstance(); 361 if (layer && bitmap->width() <= caches.maxTextureSize && 362 bitmap->height() <= caches.maxTextureSize) { 363 364 GLuint fbo = caches.fboCache.get(); 365 if (!fbo) { 366 ALOGW("Could not obtain an FBO"); 367 return false; 368 } 369 370 SkAutoLockPixels alp(*bitmap); 371 372 GLuint texture; 373 GLuint previousFbo; 374 GLuint previousViewport[4]; 375 376 GLenum format; 377 GLenum type; 378 379 GLenum error = GL_NO_ERROR; 380 bool status = false; 381 382 switch (bitmap->config()) { 383 case SkBitmap::kA8_Config: 384 format = GL_ALPHA; 385 type = GL_UNSIGNED_BYTE; 386 break; 387 case SkBitmap::kRGB_565_Config: 388 format = GL_RGB; 389 type = GL_UNSIGNED_SHORT_5_6_5; 390 break; 391 case SkBitmap::kARGB_4444_Config: 392 format = GL_RGBA; 393 type = GL_UNSIGNED_SHORT_4_4_4_4; 394 break; 395 case SkBitmap::kARGB_8888_Config: 396 default: 397 format = GL_RGBA; 398 type = GL_UNSIGNED_BYTE; 399 break; 400 } 401 402 float alpha = layer->getAlpha(); 403 SkXfermode::Mode mode = layer->getMode(); 404 GLuint previousLayerFbo = layer->getFbo(); 405 406 layer->setAlpha(255, SkXfermode::kSrc_Mode); 407 layer->setFbo(fbo); 408 409 glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*) &previousFbo); 410 glGetIntegerv(GL_VIEWPORT, (GLint*) &previousViewport); 411 glBindFramebuffer(GL_FRAMEBUFFER, fbo); 412 413 glGenTextures(1, &texture); 414 if ((error = glGetError()) != GL_NO_ERROR) goto error; 415 416 caches.activeTexture(0); 417 glBindTexture(GL_TEXTURE_2D, texture); 418 419 glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel()); 420 421 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 422 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 423 424 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 425 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 426 427 glTexImage2D(GL_TEXTURE_2D, 0, format, bitmap->width(), bitmap->height(), 428 0, format, type, NULL); 429 if ((error = glGetError()) != GL_NO_ERROR) goto error; 430 431 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 432 GL_TEXTURE_2D, texture, 0); 433 if ((error = glGetError()) != GL_NO_ERROR) goto error; 434 435 { 436 LayerRenderer renderer(layer); 437 renderer.setViewport(bitmap->width(), bitmap->height()); 438 renderer.OpenGLRenderer::prepareDirty(0.0f, 0.0f, 439 bitmap->width(), bitmap->height(), !layer->isBlend()); 440 441 caches.disableScissor(); 442 renderer.translate(0.0f, bitmap->height()); 443 renderer.scale(1.0f, -1.0f); 444 445 mat4 texTransform(layer->getTexTransform()); 446 447 mat4 invert; 448 invert.translate(0.0f, 1.0f, 0.0f); 449 invert.scale(1.0f, -1.0f, 1.0f); 450 layer->getTexTransform().multiply(invert); 451 452 if ((error = glGetError()) != GL_NO_ERROR) goto error; 453 454 { 455 Rect bounds; 456 bounds.set(0.0f, 0.0f, bitmap->width(), bitmap->height()); 457 renderer.drawTextureLayer(layer, bounds); 458 459 glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, 460 type, bitmap->getPixels()); 461 462 if ((error = glGetError()) != GL_NO_ERROR) goto error; 463 } 464 465 layer->getTexTransform().load(texTransform); 466 status = true; 467 } 468 469error: 470#if DEBUG_OPENGL 471 if (error != GL_NO_ERROR) { 472 ALOGD("GL error while copying layer into bitmap = 0x%x", error); 473 } 474#endif 475 476 glBindFramebuffer(GL_FRAMEBUFFER, previousFbo); 477 layer->setAlpha(alpha, mode); 478 layer->setFbo(previousLayerFbo); 479 glDeleteTextures(1, &texture); 480 caches.fboCache.put(fbo); 481 glViewport(previousViewport[0], previousViewport[1], 482 previousViewport[2], previousViewport[3]); 483 484 return status; 485 } 486 return false; 487} 488 489}; // namespace uirenderer 490}; // namespace android 491